<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form method="post" action="/mark">
    {% for x in lst %}
        <p>
            <font color="grey">{{loop.index}}</font>
            :
            <a href="http://youdao.com/w/eng/{{x[0]}}/#keyfrom=dict2.index">{{x[0]}}</a>
            ({{x[1]}})
            <input type="checkbox" name="marked" value="{{x[0]}}">
        </p>
    {% endfor %}
    <input type="submit" value="确定并返回"/>
    </form>
</body>
</html>